Concrete building-wall.



' M. G. MANDT.

CONCRETE BUILDING WALL.

APPLICATION FILED MAY11,1905.

Patented Oct. 13, 1908.

./NVENTOR W/TNESSES A TTORNEYJ.

" mms Gems, Wisconsin, assiciion or ONE-nem sis E.

YEBUDYANDgQKnmEfro omus OLSON, OF s'roucn'rou; JWLSCO-NSIN';

it known that I,MIonam. G. MANDT, a of the United States, residing at county of Dane, and State of e have invented new and useful ImiflContirete Building-Walls, of

the followiniis a specification. My mventionfre tes t9 improvements in concrete b walls and it pertains both in to theof the concrete buildi'n blocks and to the peculiar combination and t of such blocks when laid up in ,the wall. 4

1 The construction of my 3 invention isex- ,esmdicetedmFig. 1. ,Y Like rte are identified y the same ref- Wm 5 bout the several views.

an of blocks comprising both fl' ntend rear surfaces of the main body portion of the wall are of like construction are formed with flat top and botfaces 1, '1, straight vertical faces 2, 2,

' V-shap'ed to actions 3 formed upon verti si es, comprism the two oonver walls 4, 4 w ch conthe exteriolswallll 5 it a distance from --'t respectiveen w ere ya trian M 1 6 is'formed between said frgiit well M the two conver walls 4, 4.

v the tna 'ar shaped 6 serves for the circu ation of the between the hunt and rear walls, while 'V-aheped pro'ections of the respective at a d w W j,-.and bear against the inner 7 0' blocks of the opposixgbwall, f and Bearcourses oh ltifks strength' enan su" rteac oter.

called to the ia t that by conr walls 4, 4 with the front its end, when 'ouis mam I list a i upincouraes asindi-.

" qt Letters Patent. Application tiled in, 11, 1905. Serial No. 850,998.

e"wall. Fig. 3 represents a' extend across the inter-.

mas. iaieoe.

, cated in Fig. 1, open'spaces 7 are left between the opposing surfaces of the V-shaped projections of the respective front and rear courses, which. spacescorrespond in width to the distance between the obtuse angles 8, 8 and the ends of the blocks 9. \Vhile it is obvious that if said V-shaped, projections of the blocks of the res tive courses were extended to the ends 0 the respective blocks there would be no. aces left between said angular surfaces, but instead, the opposing angular surfaces would be brought in contact. Thus it will be obvious that when the several blocks are laid in courses, as indicated in Figs. 1, 3 and 4, a plurality of zigzag spaces are formed between the respective front and rear courses throughout the entire wall,while a plurality of triangular spaces 6 are formed in the res ive blocks.

It will understood that when the blocks are arranged in courses, so that the joints between the blocks of one course are arranged to break joints with the next adjacent courses, the V-shaped or angular projections 3 of one course will overlap and rest upon 80 the V-shaped or angular projections of the next adjacent courses as indicated in Fig. 3, whereby the blocks of the front and rear surfaces are interlocked and serve to bind the front and rear surfaces together.

For convenience in construction, I refer-- ably provide twoadditional forms 0 building b ocks indicated in Figs. 5 and 6. Fig. 5 comprises the vertical walls 10 and 11, dia onal wall- 12 and rectan ular. wall 13, sai block being provided wit an open triangular s a'ce 14 extending between its up er and ower surfaces. The block shown in ig. ,6 comprises the vertical walls 15 and 16 and diagonal wall 17, while the block is provided with an open triangular space 18. The block shown in Fig. 5 is adapted to turn the corner of the exterior course of blocks, as shown at 19, while the block shown in Fig. 6 is adapted to turn the cor- 100 nor of the interior course, as shown at 20.

Where the wall abuts against the window casing 22, asshown in Fig. 4, I preferably provide the same with the peculiar shaped locks 23, 23, one of the vertical ends of 1 which abuts against the next adjacent block 2 in the course, while their opposite ends 24,

'24 are ada ted to bear against the window with V-shaped projections 25 between which I their weight-sup orting ropes.

Havingthus escribed my invention what I claim as new and desire to secure by Let-' ters Patent is,- I

1. A concrete building wall comprising a plurality of blocks laid in courses one above another, the several blocks of such courses having parallel vertical front and rear surfaces and provided with a hollow projection, which projection is connected at its ends with the rear surface of said block at a distance from its res ective ends, the projections of one course aid in overlapping and interlocking relation with the pro ections of the precedln and next'succeeding courses, whereby a p urality of registering air passa s are formed throu h the overlapping ho low rojections of t e front and rear blocks 0? the successive courses. 7 2. In a concrete buildin wall; the combination of a plurality of building blocks each comprising an sxwriofiwau andtwo rearwardly converging wallsv each connected with the exterior wall at aii' distance frbin and diagonal'wallwith an open spam; interior corner block oomfirising the vertical walls and diagonal 'wa provided with an open s ace, ith'eangul'ar' projections of the blocks 0 i next adjacent course, all substantially as and for the purpose specified. s a 1 i 'In testimony whe'reofI aifix m c ig namfre' in the presence'of twowitnesses.

Witnessesi J. M. CLANCEY,

G. N. GAMPBElIL.

blocks being- I onecourse being; adapted to overlap and interlock withi'fthe angular projections; of the blocks of the.

MICHAEL G..MANDT.Q.- 

